Hortonworks Apache-Hadoop-Developer : Hadoop 2.0 Certification exam for Pig and Hive Developer

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Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

1. You want to perform analysis on a large collection of images. You want to store this data in HDFS and process it with MapReduce but you also want to give your data analysts and data scientists the ability to process the data directly from HDFS with an interpreted high-level programming language like Python. Which format should you use to store this data in HDFS?

A) CSV
B) Avro
C) HTML
D) XML
E) SequenceFiles
F) JSON

2. Which TWO of the following statements are true regarding Hive? Choose 2 answers

A) Useful for data analysts familiar with SQL who need to do ad-hoc queries
B) Is a relational database
C) Offers real-time queries and row level updates
D) Allows you to define a structure for your unstructured Big Data

3. You have a directory named jobdata in HDFS that contains four files: _first.txt, second.txt, .third.txt and #data.txt. How many files will be processed by the FileInputFormat.setInputPaths () command when it's given a path object representing this directory?

A) One, no special characters can prefix the name of an input file
B) Four, all files will be processed
C) Three, the pound sign is an invalid character for HDFS file names
D) None, the directory cannot be named jobdata
E) Two, file names with a leading period or underscore are ignored

4. You have just executed a MapReduce job. Where is intermediate data written to after being emitted from the Mapper's map method?

A) Into in-memory buffers that spill over to the local file system of the TaskTracker node running the Mapper.
B) Into in-memory buffers on the TaskTracker node running the Mapper that spill over and are written into HDFS.
C) Into in-memory buffers on the TaskTracker node running the Reducer that spill over and are written into HDFS.
D) Intermediate data in streamed across the network from Mapper to the Reduce and is never written to disk.
E) Into in-memory buffers that spill over to the local file system (outside HDFS) of the TaskTracker node running the Reducer

5. Which two of the following are true about this trivial Pig program' (choose Two)

A) ABC has a schema associated with it
B) Pig assumes the contents of myfile are comma delimited
C) myfile is read from the user's home directory in HDFS
D) The contents of myfile appear on stdout

Solutions: